Find the standard form of the equation of the hyperbola.
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Answer: A
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The post office recorded the weights of packages sent on a particular day and used the results to construct a histogram. Use the histogram to solve the problem. 
0-910-1920-2930-39Weight of Package (pounds)How many packages weighed between 10 and 19 pounds?
A. 6 packages B. 7 packages C. 11 packages D. 5 packages
Solve the problem.The concentration of alcohol in a person's blood is measurable. Suppose that the risk R (given as a percent) of having an accident while driving a car can be modeled by the equation R = 5ekxwhere x is the variable concentration of alcohol in the blood and k is a constant.Suppose that a concentration of alcohol in the blood of 0.07 results in a 10% risk 
of an accident. Find the constant k in the equation.Using this value of k, what is the risk if the concentration is 0.11?
What will be an ideal response?
Use properties of logarithms to expand the logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator.log3
A. 
log3 y - 2
B. log3 
- log3 9
C. log3 
- 2 log3 3
D. 
log3 y - log3 9
Simplify the expression.
A. csc2 ? B. tan2 ? C. cos ? D. cot2 ?